X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=drivers%2Fcrypto%2Ffsl%2Ffsl_blob.c;h=ce6aa05fe7f82771943653099ed9a59dee1d9f10;hb=83d290c56fab2d38cd1ab4c4cc7099559c1d5046;hp=8b259212723cd13027549c884780da186fe89c43;hpb=65994d049474394729d976273d7582552f1db332;p=platform%2Fkernel%2Fu-boot.git

diff --git a/drivers/crypto/fsl/fsl_blob.c b/drivers/crypto/fsl/fsl_blob.c
index 8b25921..ce6aa05 100644
--- a/drivers/crypto/fsl/fsl_blob.c
+++ b/drivers/crypto/fsl/fsl_blob.c
@@ -1,62 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2014 Freescale Semiconductor, Inc.
  *
- * SPDX-License-Identifier:	GPL-2.0+
- *
  */
 
 #include <common.h>
 #include <malloc.h>
+#include <memalign.h>
 #include <fsl_sec.h>
-#include <asm-generic/errno.h>
+#include <linux/errno.h>
 #include "jobdesc.h"
 #include "desc.h"
 #include "jr.h"
 
+/**
+ * blob_decap() - Decapsulate the data from a blob
+ * @key_mod:    - Key modifier address
+ * @src:        - Source address (blob)
+ * @dst:        - Destination address (data)
+ * @len:        - Size of decapsulated data
+ *
+ * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
+ * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
+ *
+ * Returns zero on success, negative on error.
+ */
 int blob_decap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
 {
-	int ret, i = 0;
+	int ret, size, i = 0;
 	u32 *desc;
 
-	printf("\nDecapsulating data to form blob\n");
-	desc = malloc(sizeof(int) * MAX_CAAM_DESCSIZE);
+	if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
+	    !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
+	    !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
+		puts("Error: blob_decap: Address arguments are not aligned!\n");
+		return -EINVAL;
+	}
+
+	printf("\nDecapsulating blob to get data\n");
+	desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
 	if (!desc) {
 		debug("Not enough memory for descriptor allocation\n");
-		return -1;
+		return -ENOMEM;
 	}
 
+	size = ALIGN(16, ARCH_DMA_MINALIGN);
+	flush_dcache_range((unsigned long)key_mod,
+			   (unsigned long)key_mod + size);
+
+	size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
+	flush_dcache_range((unsigned long)src,
+			   (unsigned long)src + size);
+
 	inline_cnstr_jobdesc_blob_decap(desc, key_mod, src, dst, len);
 
+	debug("Descriptor dump:\n");
 	for (i = 0; i < 14; i++)
-		printf("%x\n", *(desc + i));
+		debug("Word[%d]: %08x\n", i, *(desc + i));
+
+	size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
+	flush_dcache_range((unsigned long)desc,
+			   (unsigned long)desc + size);
+
 	ret = run_descriptor_jr(desc);
 
-	if (ret)
-		printf("Error in Decapsulation %d\n", ret);
+	if (ret) {
+		printf("Error in blob decapsulation: %d\n", ret);
+	} else {
+		size = ALIGN(len, ARCH_DMA_MINALIGN);
+		invalidate_dcache_range((unsigned long)dst,
+					(unsigned long)dst + size);
+
+		puts("Blob decapsulation successful.\n");
+	}
 
 	free(desc);
 	return ret;
 }
 
+/**
+ * blob_encap() - Encapsulate the data as a blob
+ * @key_mod:    - Key modifier address
+ * @src:        - Source address (data)
+ * @dst:        - Destination address (blob)
+ * @len:        - Size of data to be encapsulated
+ *
+ * Note: Start and end of the key_mod, src and dst buffers have to be aligned to
+ * the cache line size (ARCH_DMA_MINALIGN) for the CAAM operation to succeed.
+ *
+ * Returns zero on success, negative on error.
+ */
 int blob_encap(u8 *key_mod, u8 *src, u8 *dst, u32 len)
 {
-	int ret, i = 0;
+	int ret, size, i = 0;
 	u32 *desc;
 
+	if (!IS_ALIGNED((uintptr_t)key_mod, ARCH_DMA_MINALIGN) ||
+	    !IS_ALIGNED((uintptr_t)src, ARCH_DMA_MINALIGN) ||
+	    !IS_ALIGNED((uintptr_t)dst, ARCH_DMA_MINALIGN)) {
+		puts("Error: blob_encap: Address arguments are not aligned!\n");
+		return -EINVAL;
+	}
+
 	printf("\nEncapsulating data to form blob\n");
-	desc = malloc(sizeof(int) * MAX_CAAM_DESCSIZE);
+	desc = malloc_cache_aligned(sizeof(int) * MAX_CAAM_DESCSIZE);
 	if (!desc) {
 		debug("Not enough memory for descriptor allocation\n");
-		return -1;
+		return -ENOMEM;
 	}
 
+	size = ALIGN(16, ARCH_DMA_MINALIGN);
+	flush_dcache_range((unsigned long)key_mod,
+			   (unsigned long)key_mod + size);
+
+	size = ALIGN(len, ARCH_DMA_MINALIGN);
+	flush_dcache_range((unsigned long)src,
+			   (unsigned long)src + size);
+
 	inline_cnstr_jobdesc_blob_encap(desc, key_mod, src, dst, len);
+
+	debug("Descriptor dump:\n");
 	for (i = 0; i < 14; i++)
-		printf("%x\n", *(desc + i));
+		debug("Word[%d]: %08x\n", i, *(desc + i));
+
+	size = ALIGN(sizeof(int) * MAX_CAAM_DESCSIZE, ARCH_DMA_MINALIGN);
+	flush_dcache_range((unsigned long)desc,
+			   (unsigned long)desc + size);
+
 	ret = run_descriptor_jr(desc);
 
-	if (ret)
-		printf("Error in Encapsulation %d\n", ret);
+	if (ret) {
+		printf("Error in blob encapsulation: %d\n", ret);
+	} else {
+		size = ALIGN(BLOB_SIZE(len), ARCH_DMA_MINALIGN);
+		invalidate_dcache_range((unsigned long)dst,
+					(unsigned long)dst + size);
+
+		puts("Blob encapsulation successful.\n");
+	}
 
 	free(desc);
 	return ret;